Hoisting apparatus.



w, P. MURRAY. HOISTING APPARATUS APPLICATION IYILIED DEGf24, 1908."

Patented May 25, 1909.

YINVENTOR I WILLIAM F. MURRAY.

WITNESSES;

HIS ATTOR NEY.

THE NORRIS PETERS co., wasumaron, o c,

gyUNITED STATEST QFETCE.

" WILLIAM F. MURRAY,

' nq eaaeea 7 OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO SAMUEL MURRAY,- OF SAN FRANCISCO, CALIFORNIA.

HOISTING APPARATUS.

Application filed December 2 T all whom it may concern:

I f Be it known that I, WILLIAM F. MURRAY,

r depressed to a point where another load may I j be attached.

drum. Fig. 2' is a section on the line xw point'difiiculty occurs,

' means for lowering the hooks or attachments at this point.

; inatic view, it represents a holsting apparatus A upon the deck I hold of a vessel.

of this, the cable 2 from the hoisting drum wardly fromthe vessel to a point where the I load to be taken is situated, then lowered and I ciently to clear the citizen of the city and county of San Francisco and State Improvements in Hoisting p which the following is a specificatlon.

* flof that class which is employed for handling 10 the load has been discharged, and the ends of the hoisting cables carried to the point willbe-more fully explained by reference to the accompanying drawings, in which- In loading and unloading vessels, the hoisting apparatus the load from the wharf, or from the vessel s intervening obstacles, moved'outward or inward as the case may be United States, residing at the have invented new and useful pparatus, of i of California,

My invention relates to hoisting apparatus loads, as in loading or unloading ships from wharves, and for like purposes.

a It consists in a means for reversing the movement of the hoisting drum so that after where another load is to be taken, the cable may be uncoiled from the drum, and the end It comprises details of construction which Figure 1 is apartial elevation of a hoisting- Fig. 1. Fig. 3 is a diagrammatic view.

is employed to first lift hold. until itris clear of the vessels rail and and the load. is then to the point of deposit. It is then lowered and the hooks or other supporting mechanism disengaged and returned to the point where another load is to be taken. At this 7 because the weight of the hooks and cable are not suflicient to lower them automatically to the point where another load is to be taken.

My invention is designed to provide a As shown in the diagramofxa vessel B which is lying beside a wharfas at C, from which loads areto be taken and deposited in the In the usual construction passes over direction pulleys as at 3 and 4, by which the cable is a ternately moved outthe load 1 attached. Itflis then raised suffi- Specification of Letters Patent.

intervening obstructions,

Patented May 25, 1909.

Serial No. 469,041.

and is then hauled inwardly to a point where the load is to be deposited.

In order to lower the attaching devices to the point where the load is to be received, I have devised a means by which the movement of the hoisting drum may be reversed without reversing the engine so as to uncoil the cable and allow it to descend to the proper position without delay.

I have only shown in Fig. 1 sufficient of the apparatus to illustrate my invention.

5 is a pipe through which the fluid under pressure is admitted to the engine by which the'hoisting drum 6 is rotated.

7 is a lever through which the steam valve, not shown, is manipulated.

8 is a foot-lever which may also be employed for the same purpose, and it is connected by a rod 9 with the lever 7 so that when it is necessary to use the hands for other purposes, the foot-lever may be used to manipulate the valve.

In order to reverse the movement of the hoisting-drum, I have shown an idler 10 mounted upon a swiveled link 11 which is carried by a crank arm 12. This arm is fulcrumed at 13 and is extended to form or connect with, a lever 14 extending upwardly to within reach of the operator. The drum may be normally rotated by the usual gear or friction mechanism mounted upon the shaft 15, and engaging a corresponding gear connected with the drum shaft. Upon the same shaft is a friction pulley 16, the face of which is in line with the face of the idler 10. The idler 10, by reason of the spring 17, will normally drop down to be out of contact with the'friction-wheel 16, and with the corresponding frictional face on the drum, and this condition is maintained while the weight is being lifted, and transferred to the point of deposit. When the cable has been again out-hauled to the point where it must be lowered to the load, the engineer will, by grasping the lever 14, lift the rocker-arm 12, and through the link 11 will force the idler into frictional contact with the friction wheel 16 and corresponding face on the drum. This reverses the rotation of the hoisting drum and uncoils the cable, and the cable will have sufficient weight, at the outer end to lower itself to the point of attachment for the load. The lever 14 may then be released, and the idler will drop back out of contact with its cooperating frictional surfaces, and the winding drum will then be in condition to be operated by the usual driving devices, as previously described.

Having thus described my invention, what I claim and desire to secure by Letters Patent is In a hoisting apparatus of the character described, a winding drum, means by which said drum is normally revolved to lift the load, means by which the motion of the drum may be independently reversed, said means including an independent frictional drum, capable of being driven from the motor shaft, an idler, a loose link upon which the idler is swiveled, a rocker-arm and lever by which the idler may be moved into contact with the frictional surface of the driver, and corresponding surface of the drum, or released therefrom, said link being carried by the outer end of said rocker arm.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

i I l l l l l WILLIAM F. MURRAY. Witnesses HARRY J. LASK, WM. SCHWARTZ. 

